Textbook rental service Zookal has embarked on a joint venture with University of Sydney engineers to deliver parcels via robotic, flying drones.The new company, Flirtey, is currently seeking regulatory approval from the Civil Aviation Safety Authority with a view to piloting the new delivery service at the University of Sydney next month.Flirtey was co-founded by Zookal CEO Ahmed Haider and Matthew Sweeny of software company Vimbra.A company spokesperson said Flirtey drone delivery would cost businesses $2.99 per delivery, compared to $29.95 for same-day postal delivery in Australia.Flirtey announced that other ecommerce businesses besides Zookal had agreed to use its delivery service, but none were named.The drones operate on rechargeable lithium polymer batteries, can carry parcels of up to 2kg, and have a range of 3km. They use GPS to locate customers, and may be tracked via smartphone in real-time.